Investigation of an Unsaturated, Fine-Grained Pavement Subgrade Soil

摘要

This paper describes preliminary findings from research on a fine-grained subgrade soil. Laboratory soil-water characteristic and permeability tests were conducted on recompacted soil samples from a site where test pavements were instrucmented with seasonal instrumentation. Predictions from a computer porgram that models one-dimensional coupled heat and moisture flow are compared to measured variations of temprature and moisture obtained from the seasonal instrumentation. Recommendations are made for testing of unsaturated fine-grained soils and for modeling climatic effects on pavements.